Articles 21 and 28 in the sixth report of Barboza, Yearbook … 1990, vol. II (Part One), document A/CN.4/428 and Add.1, chaps.
Artículos 21 y 28 del sexto informe de Barboza, Anuario 1990, vol. II (primera parte), documento A/CN.4/428 y Add.1, caps.